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| 厚铝管中激光激发温度场和瑞利波的模拟 | |
| 引用本文： | 何跃娟,朱日宏,沈中华,陆建,倪晓武.厚铝管中激光激发温度场和瑞利波的模拟[J].南京理工大学学报(自然科学版),2005,29(4):468-471. |
| 作者姓名： | 何跃娟 朱日宏 沈中华 陆建 倪晓武 |
| 作者单位： | 1. 南京理工大学,电子工程与光电技术学院,江苏,南京,210094;江南大学理学院,江苏,无锡,214062 2. 南京理工大学,电子工程与光电技术学院,江苏,南京,210094 3. 南京理工大学,理学院,江苏,南京,210094 |
| 基金项目： | 国家自然科学基金（60208004） |
| 摘 要： | 利用有限元方法数值模拟了脉冲激光作用于厚铝管时产生的温升以及由此温升而产生的表面瑞利波的情况。给出了温度随角向的分布曲线，比较了物理参数随温度变化和不随温度变化两种情况下温度场的区别，并进一步得到了近场区域表面波的时域波形。数值结果表明：在考虑材料物理参数随温度变化基础上得到的近场区域的表面声波中显著的波为掠面纵波和瑞利波，与平板中的类似。为热弹条件下管状材料的激光超声无损检测提供了参考。 |
| 关 键 词： | 激光超声 瑞利波 有限元方法 |
| 文章编号： | 1005-9830(2005)04-0468-04 |
| 收稿时间： | 2004-03-01 |
| 修稿时间： | 2004年3月1日 |
Simulation of Laser-induced Temperature Fields and Rayleigh Waves in Thick Al Pipe |
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| HE Yue-juan,ZHU Ri-hong,SHEN Zhong-hua,LU Jian,NI Xiao-wu.Simulation of Laser-induced Temperature Fields and Rayleigh Waves in Thick Al Pipe[J].Journal of Nanjing University of Science and Technology(Nature Science),2005,29(4):468-471. | |
| Authors: | HE Yue-juan ZHU Ri-hong SHEN Zhong-hua LU Jian NI Xiao-wu |
| Abstract: | The temperature fields and the surface Rayleigh waves generated by a pulsed laser in a thick A1 pipe are analysed by using a finite element method. The difference of temperature fields from considering and neglecting the temperature-dependence of material parameters is compared, and the temperature distributions of A1 pipe are obtained in angular orientation at various time. The numerical results show that the main features of the surface acoustic waves obtained in the near fields after considering the temperature-dependence of material parameters are two kinds of waves-the surface skimming longitudinal wave and the Rayleigh wave, which is similar as those in a plate. It is useful in the applications in the laser-ultrasonic non-destructive evaluation of the hollow cylindrical systems. |
| Keywords: | laser-ultrasonic Rayleigh waves finite element method |
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